千足虫（Spirobolus walker）在与马尾松凋落物结合时，更喜欢以同伴物种的高质量凋落物为食

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2025-02-26 DOI:10.1016/j.pedobi.2025.151033

Cong Li , Lige Liu , Zhangming Wu , Wengong Wang , Shenghan Wang , Xinhua He , Xinglei Cui , Jiujin Xiao , Yang Liu

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引用次数: 0

摘要

单一栽培的人工林，特别是针叶树种（马尾松），经常阻碍养分循环，导致生物多样性和土壤肥力下降。因此，选择合适的伴生树种，特别是本地阔叶树种，对改善森林生态系统功能至关重要。千足虫（Spirobolus walker）是一种分布广泛的大型节肢动物，主要消耗凋落物，在陆地生态系统中起着重要的有机物分解和养分循环作用。研究千足虫的取食偏好与凋落物质量的关系，可以为选择合适的混交树种提供参考，从而促进马尾松人工林的可持续管理。以喜树（Camptotheca acuminata）（优质凋落物）、栎（Quercus variabilis）（中等品质）和含笑（Michelia wilsonii）（低品质）3种典型亚热带阔叶植物为研究对象，结合马尾松凋落物进行了千足虫取食试验。我们发现千足虫对凋落物形态的反应比对化学特征的反应更大。凋落物中以缩合单宁和木质素为主的酸不溶性组分对千足虫的取食偏好几乎没有影响。尽管棘果含有大量的单宁和酚类物质，但由于棘果的管状性和氮浓度较高，千足虫对棘果的食用量最高（44 mg·g−1·d−1）。此外，在多种凋落物来源条件下，马尾松对优质凋落物的偏好更大，表明马尾松对马尾松混合凋落物的适应性更强。因此，单一物种向以多物种为基础的人工林的转变将通过千足虫的优先进食活动加强物质的循环，特别是碳和氮。

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Millipede (Spirobolus walker) prefers feeding on a high-quality litter from a companion species when combined with Masson pine litter

Monoculture plantations, particularly the coniferous species (Pinus massoniana), often impede nutrient cycling, leading to declines in biodiversity and soil fertility. Selection of suitable companion tree species, especially a native broadleaf species is thus essential for improving forest ecosystem functions. Millipedes (Spirobolus walker), a widely distributed large arthropod to primarily consume litter, play a pivotal role in organic matter decomposition and nutrient cycling in terrestrial ecosystems. Addressing the feeding preferences of millipedes in relation to litter quality could provide insights into selection of appropriate mixed tree species, thereby facilitating the sustainable management of Masson pine plantations. Millipede feeding experiments on leaf litter from three typical subtropical broadleaf species – Camptotheca acuminata (high-quality litter), Quercus variabilis (intermediate-quality), and Michelia wilsonii (low-quality), were conducted in combination with Masson litter. We found that millipedes responded more to litter morphology rather than chemical characteristics. Acid insoluble components, consisting mainly of condensed tannins and lignin in litter had almost no effects on millipede feeding preferences. Despite C. acuminata containing high levels of tannins and phenols, millipedes exhibited the highest consumption rate (44 mg·g⁻¹·d⁻¹) on it, due to its higher tubularity and nitrogen concentration. Additionally, when multiple litter sources were available, millipedes showed greater preference for consuming high-quality litter, an indication of the better suitability of C. acuminata for mixture with Masson pine. A transformation of mono-species into a multiple-species based plantation forest would therefore enhance circulation of materials, particularly carbon and nitrogen, through millipedes’ preferential feeding activity.

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.